<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
      <h3 class="title">山河笑登录后台</h3>
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input v-model="loginForm.username" name="username" type="text" auto-complete="on" placeholder="请输入用户名" />
      </el-form-item>
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :type="pwdType"
          v-model="loginForm.password"
          name="password"
          auto-complete="on"
          placeholder="请输入密码"
          @keyup.enter.native="handleLogin" />
        <span class="show-pwd" @click="showPwd">
          <svg-icon icon-class="eye" />
        </span>
      </el-form-item>
      <div class="check-code">
        <el-form-item prop="code">
          <el-input v-model="loginForm.code" name="code" type="text" auto-complete="on" placeholder="请输入验证码" />
        </el-form-item>
        <img :src="url" alt="" class="image" @click="getCheckCode">
      </div>
      <div class="forget" @click="handleForgetPass">忘记密码?</div>
      <el-form-item>
        <el-button :loading="loading" type="primary" style="width:100%;" @click.native.prevent="handleLogin">
          登录
        </el-button>
      </el-form-item>
    </el-form>
    <el-dialog :visible.sync="dialogForgetPassword" :modal="true" :append-to-body="true" title="忘记密码" class="dialog">
      <el-form :model="forgetForm" :rules="forgetRules" auto-complete="on">
        <el-form-item label-width="100px" label="手机号码" prop="phone">
          <el-input v-model="forgetForm.phone" placeholder="请输入内容" name="phone" type="text" class="forget-input" auto-complete="off" style="width: auto"/>
        </el-form-item>
        <el-form-item label-width="100px" label="验证码" prop="code">
          <el-input v-model="forgetForm.code" placeholder="请输入内容" name="code" type="text" class="forget-input" auto-complete="off" style="width: auto"/>
          <el-button type="primary" @click="handleGetCode">获取验证码</el-button>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="handleDialogForgetPasswordCancle">取 消</el-button>
        <el-button type="primary" @click="handleDialogForgetPassword">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { isvalidUsername, validatePhone } from '@/utils/validate'
import { getCode, retrievePassword, getMsgCode } from '@/api/login'
import base from '@/api/base'
export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!isvalidUsername(value)) {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    }
    const validatePass = (rule, value, callback) => {
      if (value.length < 3) {
        callback(new Error('密码不能小于3位'))
      } else {
        callback()
      }
    }
    const vaidateCode = (rule, value, callback) => {
      if (value.trim() === '') {
        callback(new Error('验证码错误'))
      } else {
        callback()
      }
    }
    const validateMobile = (rule, value, callback) => {
      console.log(value)
      if (!validatePhone(value)) {
        callback(new Error('手机号格式错误'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: 'zhangsan',
        password: '123',
        code: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePass }],
        code: [{ required: true, trigger: 'blur', validator: vaidateCode }]
      },
      loading: false,
      pwdType: 'password',
      redirect: undefined,
      url: '',
      dialogForgetPassword: false,
      forgetRules: {
        phone: [{ required: true, trigger: 'blur', validator: validateMobile }],
        code: [{ required: true, trigger: 'blur', validator: vaidateCode }]
      },
      forgetForm: {
        phone: '',
        code: ''
      }
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  created() {
    this.getCheckCode()
  },
  methods: {
    showPwd() {
      if (this.pwdType === 'password') {
        this.pwdType = ''
      } else {
        this.pwdType = 'password'
      }
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('Login', this.loginForm).then(() => {
            this.loading = false
            this.$router.push({ path: this.redirect || '/' })
          }).catch((error) => {
            this.$message.error(error)
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    changeCode() {
      const url = `${base.pro}/common/authCode?a=${+new Date()}`
      this.url = url
    },
    getCheckCode() {
      getCode().then((res) => {
        const codeImg = 'data:image/png;base64, ' + btoa(new Uint8Array(res).reduce((data, byte) => data + String.fromCharCode(byte), ''))
        this.url = codeImg
      }).catch((e) => {
        this.$message.error({
          message: '请稍后再试',
          duration: 1000
        })
      })
    },
    handleForgetPass() {
      this.dialogForgetPassword = true
    },
    handleDialogForgetPassword() {
      const flag = this.check()
      this.dialogForgetPassword = false
      if (!flag) {
        return false
      }
      retrievePassword(this.forgetForm.phone, this.forgetForm.code).then((res) => {
        if (res.success) {
          this.$message.success({
            duration: 1000,
            message: '密码找回成功'
          })
        } else {
          this.$message.error({
            duration: 1000,
            message: res.msg
          })
        }
      }).catch((e) => {
        this.$message.success({
          duration: 1000,
          message: '请稍后再试'
        })
      })
    },
    check() {
      if (!validatePhone(this.forgetForm.phone)) {
        this.$message.error({
          message: '手机号码格式不正确',
          duration: 1000
        })
        return false
      }
      if (this.forgetForm.code.trim() === '') {
        this.$message.error({
          message: '验证码不能为空',
          duration: 1000
        })
        return false
      }
      return true
    },
    handleDialogForgetPasswordCancle() {
      this.forgetForm.phone = ''
      this.forgetForm.code = ''
      this.dialogForgetPassword = false
    },
    handleGetCode() {
      if (!validatePhone(this.forgetForm.phone)) {
        this.$message.error({
          message: '手机号码格式不正确',
          duration: 1000
        })
        return false
      }
      getMsgCode(this.forgetForm.phone).then((res) => {
        if (res.success) {
          return true
        } else {
          this.$message.error({
            message: res.msg,
            duration: 1000
          })
        }
      }).catch((e) => {
        this.$message.error({
          message: '请稍后再试',
          duration: 1000
        })
      })
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
$bg:#2d3a4b;
$light_gray:#eee;

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;
    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      &:-webkit-autofill {
        -webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: #fff !important;
      }
    }
  }
  .el-input.forget-input input{
    width: 200px;
  }
  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
  .check-code {
    display: flex;
    justify-content: space-between;
    .el-form-item{
      flex:1
    }
    .image{
      margin-left: 20px;
      width: 100px;
      height: 50px;
      cursor: pointer;
    }
  }
  .forget {
    height: 30px;
    line-height: 30px;
    text-align: right;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    &:hover {
      color :#409EFF;
    }
  }
}

</style>

<style rel="stylesheet/scss" lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;
.login-container {
  position: fixed;
  height: 100%;
  width: 100%;
  background-color: $bg;
  .login-form {
    position: absolute;
    left: 0;
    right: 0;
    width: 520px;
    max-width: 100%;
    padding: 35px 35px 15px 35px;
    margin: 120px auto;
  }
  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;
    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }
  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }
  .title {
    font-size: 26px;
    font-weight: 400;
    color: $light_gray;
    margin: 0px auto 40px auto;
    text-align: center;
    font-weight: bold;
  }
  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
